Coronary thrombosis refers to the formation of a blood clot within a coronary artery, which can obstruct blood flow to the heart muscle. When this occurs, tissue in the heart can become ischemic (lacking oxygen), potentially leading to a myocardial infarction, commonly known as a heart attack. This condition results from a significant enough reduction in blood flow, depriving parts of the heart muscle of necessary oxygen and nutrients, ultimately causing damage or death to that tissue.
A myocardial infarction is a severe and urgent medical emergency, as it can lead to further complications, including diminished heart functionality. The process of coronary thrombosis and its progression to a myocardial infarction illustrates the critical nature of immediate intervention in cardiovascular events.
While arrhythmias, angina pectoris, and cardiac arrest are all serious conditions that may follow or be associated with coronary artery issues, the direct consequence of coronary thrombosis, particularly when it significantly obstructs blood flow, is the myocardial infarction, making this the most appropriate answer in the context of after-effects directly caused by the thrombosis itself.